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HELI-COIL 7/16"-20 UNF General Purpose STI Tap, H3 / 3B, Plug Chamfer, 4 Flute - General Purpose STI Taps
HELI-COILGeneral Purpose STI Taps

HELI-COIL 7/16"-20 UNF General Purpose STI Tap, H3 / 3B, Plug Chamfer, 4 Flute

The HELI-COIL Screw Thread Insert STI Tap (Straight Flute, MPN 7FPB) is a general-purpose tap for 7/16"-20 UNF threads, with H3 / 3B tolerance and a plug chamfer. It features 4 flutes and is designed for installing…

SKU 3G-OTH-262157

Also listed as: 7 FPB · 7-FPB

Brand
HELI-COIL
Item
7/16"-20 UNF General Purpose STI Tap, H3 / 3B, Plug Chamfer, 4 Flute
Part Number
7FPB
Category
General Purpose STI Taps
Available to Order
Also known as:7FPBHELI-COIL
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Technical specs
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Local availability & support

Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Compliance & shipping

Hazardous material
Not classified as hazardous
California Prop 65 warning
No warning recorded
Licence required
No licence required
Safety Data Sheet
Not available
Special shipping
Ships under standard freight

Technical Specifications

HELI-COIL
Manufacturer Part Number
7FPB
Type
H3 / 3B, Plug Chamfer
Material
High Speed Steel
Flute
4
UNSPSC
23153305
Standards
ANSI; ISO 14001; ISO 9001; OS 9000
Tap Style
Straight Flute
Flute Type
Straight
Shank Type
Straight
Thread Size
7/16"-20
Catalog Page
N/A
Chamfer Type
Plug
Class of Fit
3B
Thread Limit
H3
Thread Length
1.65625 in
Drill Bit Size
29/64 in
Finish/Coating
Bright (Uncoated)
Overall Length
3-3/8 in
Shank Diameter
367/1000 in
Tap Application
Through Hole
Number of Flutes
4
Thread Direction
Right Hand
Country of Origin
USA (subject to change)
Primary Material Application
Aluminum; Brass; Bronze; Copper; Magnesium
Secondary Material Application
Steel; Cast Iron

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HELI-COIL Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The HELI-COIL Screw Thread Insert STI Tap (Straight Flute, MPN 7FPB) is a general-purpose tap for 7/16"-20 UNF threads, with H3 / 3B tolerance and a plug chamfer. It features 4 flutes and is designed for installing HELI-COIL screw thread inserts.

Frequently Asked Questions

What is a HELI-COIL STI tap used for?

A HELI-COIL STI tap cuts threads for installing screw thread inserts, commonly used to repair or strengthen threads in aluminum, cast iron, and other materials. It is designed for general-purpose tapping with a plug chamfer and 4-flute geometry for efficient chip evacuation.

What are the specifications of the HELI-COIL 7FPB STI tap?

The HELI-COIL 7FPB is a straight-flute STI tap with 7/16"-20 UNF thread, H3 / 3B tolerance, 4 flutes, and a plug chamfer. It is designed for general-purpose use and manufactured by HELI-COIL under part number 7FPB.

Where to buy HELI-COIL STI taps worldwide?

3G Electric supplies HELI-COIL STI taps like the 7FPB to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this and other industrial tooling needs.

How to select the correct STI tap for a thread insert?

Select an STI tap that matches the insert's thread size and pitch, such as 7/16"-20 UNF. Use a tap with the correct tolerance class (e.g., H3 / 3B) and chamfer type (plug for through or blind holes). Always follow the insert manufacturer's recommendations for hole size and depth.

Used in

Common applications for HELI-COIL
Aerospace — Tangless screw-locking HELI-COIL inserts in 18-8 stainless steel for vibration-resistant threaded joints in airframe and engine components.
Automotive — Free-running tanged HELI-COIL inserts in metric sizes for repairing stripped threads in aluminum engine blocks and transmission housings.
Industrial machinery — STI taps and prewinder installation tools for on-site repair of threaded holes in cast iron and steel machine frames.
Oil and gas — Nitronic 60 HELI-COIL inserts for galling resistance in stainless steel valve bodies and pump housings exposed to corrosive media.
MRO and maintenance — HELI-COIL thread repair kits containing inserts, drill, tap, and installation tool for restoring damaged threads without replacing the parent component.
Electrical equipment — Screw-locking tangless HELI-COIL inserts for securing fasteners in metal enclosures and control panels subject to vibration.
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HELI-COIL Products

3G Electric supplies HELI-COIL general purpose sti taps. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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